865365505563568 has 40 divisors (see below), whose sum is σ = 1750388904770400. Its totient is φ = 413670424763904.

The previous prime is 865365505563479. The next prime is 865365505563589.

It is a happy number.

865365505563568 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×865365505563568² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 865365505563494 and 865365505563503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567517173 + ... + 569039956.

It is an arithmetic number, because the mean of its divisors is an integer number (43759722619260).

Almost surely, 2^{865365505563568} is an apocalyptic number.

It is an amenable number.

865365505563568 is an abundant number, since it is smaller than the sum of its proper divisors (885023399206832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865365505563568 is a wasteful number, since it uses less digits than its factorization.

865365505563568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136559229 (or 1136559223 counting only the distinct ones).

The product of its (nonzero) digits is 11664000000, while the sum is 76.

The spelling of 865365505563568 in words is "eight hundred sixty-five trillion, three hundred sixty-five billion, five hundred five million, five hundred sixty-three thousand, five hundred sixty-eight".